{ "schema": 1, "sqlstate": "08001", "condition_name": "sqlclient_unable_to_establish_sqlconnection", "sources": [ { "id": "src.errcodes.18.6", "kind": "upstream_source", "source_role": "condition_definition", "tag": "REL_18_6", "commit": "724edf9bde9d356724ad384a2e196edc3c9f80f7", "path": "src/backend/utils/errcodes.txt", "sha256": "6e8de346643ba84aa3c9c6a73360acfc7b2dfb89162c06c08ce9bf5bcd5bbcba", "url": "https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/src/backend/utils/errcodes.txt" }, { "id": "src.calls.REL_18_6", "kind": "local_artifact", "source_role": "source_call_scan", "sha256": "9ee8a0e81d8f0825c5c1ae45583439859a26e602bdd4ce2f2a62aa278867ccbf", "tag": "REL_18_6" }, { "id": "src.calls.REL_10_23", "kind": "local_artifact", "source_role": "source_call_scan", "sha256": "00d16d3eb01b71ccf1b245c8f3102f9d0ec9f36fb02777b8dd1b99fcb263040c", "tag": "REL_10_23" }, { "id": "src.dblink-connect.18.6", "kind": "upstream_source", "source_role": "source_call", "tag": "REL_18_6", "commit": "724edf9bde9d356724ad384a2e196edc3c9f80f7", "path": "contrib/dblink/dblink.c", "sha256": "e4cfaec3a0a1e5d23fded584725e0f6cf7a17321ad99e5fe046e8b7f97416f15", "url": "https://github.com/postgres/postgres/blob/724edf9bde9d356724ad384a2e196edc3c9f80f7/contrib/dblink/dblink.c#L335-L338" }, { "id": "src.dblink-connect.10.23", "kind": "upstream_source", "source_role": "source_call", "tag": "REL_10_23", "commit": "02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4", "path": "contrib/dblink/dblink.c", "sha256": "2d542cc722ba361bd59990aaed7fe7c0f8e147155df5e5fcd56ee03b4dd27c61", "url": "https://github.com/postgres/postgres/blob/02991e79f8f58bc208f05dcc8af0c62dbe0a6ea4/contrib/dblink/dblink.c#L299-L302" }, { "id": "doc.transactions.18", "kind": "upstream_source", "source_role": "transaction_recovery_documentation", "tag": "PG18-docs", "commit": "724edf9bde9d356724ad384a2e196edc3c9f80f7", "path": "doc/src/sgml/xact.sgml", "sha256": "b48fbe8bd02ce3d1181a350c88c8baa6e11c73edc90a936e77b180daef328c5c", "url": "https://www.postgresql.org/docs/18/tutorial-transactions.html" }, { "id": "manifest.08001", "kind": "local_artifact", "source_role": "case_manifest", "sha256": "d1310befd467814a86638f37b0b2fc4ede637b6a459e511d5e9eacccf0e1cadd", "tag": "workspace" }, { "id": "snippet-registry.08001", "kind": "local_artifact", "source_role": "snippet_registry", "sha256": "8227f1b7b90faa2fd296bc921279c0f357637ae39695f481f9979af01b22e93e", "tag": "workspace" } ], "claims": [ { "id": "identity.class-and-condition", "statement": "08001 is the sqlclient_unable_to_establish_sqlconnection condition in Class 08.", "method": "Read the fixed errcodes.txt definition and the locked catalogue metadata.", "limits": "Directory identity does not identify every backend or client path.", "sources": [ "src.errcodes.18.6" ] }, { "id": "mechanism.backend-path", "statement": "The fixed source paths associated with 08001 report the condition in the mechanism selected for this page.", "method": "Trace the resolved source call records at the fixed release commits and compare their dynamic message fields.", "limits": "Other calls can retain the same SQLSTATE with different context or text.", "sources": [ "src.dblink-connect.18.6", "src.dblink-connect.10.23" ] }, { "id": "runtime.representative-case", "statement": "The selected dblink_connect_failure case passed with the expected structured diagnostics, recovery assertions, and cleanup on PostgreSQL 18.6 and 10.21.", "method": "Run the shared registry case on isolated runner-owned latest and PG10 targets; inspect the final summaries and raw results.", "limits": "This covers the selected case and versions only; it does not generalize to every driver, proxy, or intermediate release.", "sources": [ "snippet-registry.08001", "manifest.08001" ], "runtime": [ "runtime.08001-dblink-repair-latest2.latest", "runtime.08001-dblink-repair-pg10c.pg10" ] }, { "id": "transaction-boundary", "statement": "The selected dblink ERROR is observed under autocommit, where the owner session remains IDLE; when the same ERROR occurs inside an explicit transaction, PostgreSQL's transaction recovery rules require rollback or an intentional savepoint before unrelated work.", "method": "Combine the fixed dblink ERROR source path with the official transaction and savepoint recovery contract.", "limits": "No explicit-transaction dblink runtime was selected in this batch; the transaction guidance is the general ERROR boundary, not a claim about a specific remote topology.", "sources": [ "src.dblink-connect.18.6", "doc.transactions.18" ] }, { "id": "versions.catalogue-boundary", "statement": "The locked catalogue records 08001 in the listed snapshots; the runtime comparison here is limited to PostgreSQL 18.6 and 10.21.", "method": "Read the generated facts block and locked manifest, then compare the selected target summaries.", "limits": "Presence in a definition file is not an exact behavioral introduction; the two runtime targets do not prove all middle versions.", "sources": [ "src.errcodes.18.6", "src.calls.REL_18_6", "src.calls.REL_10_23" ] } ], "messages": [ { "id": "message.dblink-establish", "sqlstate": "08001", "severity_source": "explicit ERROR", "sources": [ "src.dblink-connect.18.6", "src.dblink-connect.10.23" ], "primary_template": "could not establish connection", "detail_template": "%s", "detail_boundary": "The fixed dblink.c call passes libpq's already-assembled connection error through errdetail_internal(\"%s\", msg); the refused-port text below is an observation from the selected run, not a PostgreSQL format template." } ], "usage_evidence": [ { "scope": "SQLSTATE directory identity", "status": "definition_only", "evidence_ids": [ "identity.class-and-condition", "src.errcodes.18.6" ] }, { "scope": "Selected backend mechanism", "status": "source_path_confirmed", "evidence_ids": [ "mechanism.backend-path", "src.dblink-connect.18.6", "src.dblink-connect.10.23", "transaction-boundary", "doc.transactions.18" ] }, { "scope": "Observed dblink_connect_failure on isolated targets", "status": "observed_runtime", "evidence_ids": [ "runtime.representative-case", "snippet-registry.08001", "runtime.08001-dblink-repair-latest2.latest", "runtime.08001-dblink-repair-pg10c.pg10" ] }, { "scope": "Locked release presence and bounded version comparison", "status": "definition_only", "evidence_ids": [ "versions.catalogue-boundary", "src.errcodes.18.6" ] } ], "runtime": [ { "id": "runtime.08001-dblink-repair-latest2.latest", "kind": "runtime_observation", "run_id": "08001-dblink-repair-latest2", "target": "latest", "status": "passed", "server_version": "18.6 (Homebrew)", "server_version_num": 180006, "cases": [ "dblink_connect_failure" ], "summary_sha256": "5dace2836aa9b1c47208ad250c2f527fb65c6947db4c7167cb210721eb92b4c6", "raw_sha256": "076f97e40f38907d27d3436ac7657fefbb521ef313898410efabc7032908092a", "case_manifest_sha256": "d1310befd467814a86638f37b0b2fc4ede637b6a459e511d5e9eacccf0e1cadd", "snippet_registry": { "sha256": "8227f1b7b90faa2fd296bc921279c0f357637ae39695f481f9979af01b22e93e" }, "environment": { "target_kind": "latest", "server_version": "18.6 (Homebrew)", "server_version_num": "180006", "machine": "arm64", "platform": "macOS-26.6.2-arm64-arm-64bit-Mach-O", "libpq_version": "18.6", "psycopg_version": "3.3.5", "python_version": "3.14.6 (main, Jun 10 2026, 10:03:53) [Clang 21.0.0 (clang-2100.0.123.102)]", "locale": "en_US.UTF-8", "lc_messages": "C", "log_destination": "csvlog,jsonlog" }, "observed": { "connection_autocommit": true, "connection_scope": "server-side dblink connection to the same runner-owned target and a refused runner-local port", "dblink_repair": { "disconnected": "OK", "opened": "OK", "remote_probe": 1 }, "diagnostic": { "column_name": null, "constraint_name": null, "context": null, "datatype_name": null, "exception_type": "SqlclientUnableToEstablishSqlconnection", "internal_position": null, "internal_query": null, "message_detail": "connection to server at \"127.0.0.1\", port 1 failed: Connection refused\n\tIs the server running on that host and accepting TCP/IP connections?", "message_hint": null, "message_primary": "could not establish connection", "schema_name": null, "severity": "ERROR", "severity_nonlocalized": "ERROR", "source_file": "dblink.c", "source_function": "dblink_connect", "source_line": "338", "sqlstate": "08001", "statement_position": null, "table_name": null, "text": "could not establish connection\nDETAIL: connection to server at \"127.0.0.1\", port 1 failed: Connection refused\n\tIs the server running on that host and accepting TCP/IP connections?" }, "probe": 1, "statuses": { "after_error": "IDLE", "final": "IDLE" } }, "assertions": [ { "expected": "08001", "name": "dblink connection SQLSTATE", "observed": "08001", "passed": true }, { "expected": "could not establish connection", "name": "dblink connection diagnostic", 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(clang-2100.0.123.102)]", "locale": "en_US.UTF-8", "lc_messages": "en_US.utf8", "log_destination": "csvlog" }, "observed": { "connection_autocommit": true, "connection_scope": "server-side dblink connection to the same runner-owned target and a refused runner-local port", "dblink_repair": { "disconnected": "OK", "opened": "OK", "remote_probe": 1 }, "diagnostic": { "column_name": null, "constraint_name": null, "context": null, "datatype_name": null, "exception_type": "SqlclientUnableToEstablishSqlconnection", "internal_position": null, "internal_query": null, "message_detail": "could not connect to server: Connection refused\n\tIs the server running on host \"127.0.0.1\" and accepting\n\tTCP/IP connections on port 1?", "message_hint": null, "message_primary": "could not establish connection", "schema_name": null, "severity": "ERROR", "severity_nonlocalized": "ERROR", "source_file": "dblink.c", "source_function": "dblink_connect", "source_line": "302", "sqlstate": "08001", "statement_position": null, "table_name": null, "text": "could not establish connection\nDETAIL: could not connect to server: Connection refused\n\tIs the server running on host \"127.0.0.1\" and accepting\n\tTCP/IP connections on port 1?" }, "probe": 1, "statuses": { "after_error": "IDLE", "final": "IDLE" } }, "assertions": [ { "expected": "08001", "name": "dblink connection SQLSTATE", "observed": "08001", "passed": true }, { "expected": "could not establish connection", "name": "dblink connection diagnostic", "observed": "could not establish connection", "passed": true }, { "expected": "IDLE", "name": "failed connection attempt leaves session usable", "observed": "IDLE", "passed": true }, { "expected": "OK and remote SELECT 1", "name": "correct dblink connection can be repaired", "observed": { "open": "OK", "remote": 1 }, "passed": true }, { "expected": "OK", "name": "named dblink handle is explicitly released", "observed": "OK", "passed": true }, { "expected": "SELECT 1 and IDLE", 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